Mitutoyo 129-110 Depth Micrometer, Interchangeable Rods 0-75mm, 63mm Base
Part No. 129-110 | Range 0–75 mm | Graduation 0.01 mm | Accuracy ±3 µm | 3 Interchangeable Rods
Product Overview
The Mitutoyo 129-110 depth micrometer is designed for accurate measurement of holes, slots, steps, recesses, counterbores and shoulder distances across a 0–75 mm range. Its hardened, ground and micro-lapped reference base provides a stable surface across the opening, while the micrometer head drives a Ø4 mm measuring rod down to the bottom of the feature.
Three interchangeable rods extend the measuring range in 25 mm steps, allowing the instrument to cover depths up to 75 mm. Each rod has a lapped measuring face, while the measuring rod clamp secures the selected rod during use. A ratchet stop helps maintain consistent measuring force for repeatable readings.
The compact 63.5 × 16 mm base is useful when measuring around narrow shoulders and smaller counterbores where a larger reference base could overhang the workpiece. The 129-110 is suited to dimensional inspection of machined components, including counterbore depths, slot and keyway depths, step heights and shoulder distances.
For applications requiring a longer measuring range, the Mitutoyo 129-153 provides a 0–300 mm range with 12 interchangeable rods.
Key Benefits
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0–75 mm measuring range using 3 interchangeable rods.
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0.01 mm graduation for precise analog depth readings.
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±3 µm micrometer head accuracy.
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Hardened, ground and micro-lapped 63.5 × 16 mm reference base.
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Ø4 mm interchangeable rods with lapped measuring faces.
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25 mm rod increments for flexible depth measurement.
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Ratchet stop helps provide consistent measuring force.
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Measuring rod clamp secures the selected rod during measurement.
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Supplied in a fitted case for storage and protection.
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Suitable for counterbores, slots, keyways, steps, recesses and shoulder measurements.
Who This Product Is Best For
The Mitutoyo 129-110 is suitable for machine shops, mould and die makers, quality inspectors, maintenance teams and dimensional inspection applications requiring depth measurement up to 75 mm.
It can be used for first-off inspection, checking machined features between operations, verifying counterbore and slot depths, and measuring recesses or shoulder distances on manufactured components.
How to Use
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Select the interchangeable rod appropriate for the required measuring depth and secure it with the measuring rod clamp.
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Check the micrometer setting against a suitable reference such as a surface plate or gauge block.
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Position the 63.5 × 16 mm base flat and square across the feature opening.
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Turn the thimble to extend the rod toward the bottom of the feature.
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Finish the measurement using the ratchet stop to apply consistent measuring force.
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Read the sleeve and thimble, taking the selected rod's starting value into account when determining the total depth.
Frequently Asked Questions
What is the Mitutoyo 129-110 used for?
The 129-110 is used to measure the depth of holes, slots, steps, recesses, counterbores and similar internal features from 0 to 75 mm.
How accurate is the Mitutoyo 129-110?
The micrometer head accuracy is ±3 µm. The interchangeable rods have an accuracy specification of ±(2 + L/75) µm, where L is the maximum measuring length in millimetres.
How many interchangeable rods are supplied?
The supplied product information specifies 3 interchangeable Ø4 mm rods with 25 mm increments covering the 0–75 mm measuring range.
What is the base size?
The reference base measures 63.5 × 16 mm, with a specified base flatness of 1.3 µm.
Does the Mitutoyo 129-110 require a battery?
No. The 129-110 is a mechanical analog depth micrometer and does not require a battery.
What is the difference between the 129-110 and 129-153?
The 129-110 covers 0–75 mm with 3 interchangeable rods and a 63.5 × 16 mm base. The 129-153 extends the measuring range to 0–300 mm and uses 12 interchangeable rods.
How do I buy the Mitutoyo 129-110 in Saudi Arabia?
Contact General Tech Services in Dammam at +966 569 289 544 or email mathews@generaltechsaudi.com for pricing and availability.
